Exclusive Black Friday Polytunnel Deals – All Month Long
November doesn’t have to be dull, not when you can make serious savings on Britain’s toughest growing structures and accessories. Our Black November Sale runs from 1st–30th November, giving you a whole month of web-exclusive offers to get ready for the new growing season.
You’ll find up to 50% off a wide range of products, from polytunnels and field shelters to fans, parts, and irrigation kits. Whether you’re a home grower, market gardener, or commercial producer, now’s the time to upgrade, repair, or expand your setup before spring arrives.
All discounted products can be found on our dedicated Black November Sale page →, or simply browse the website as normal, discounts will appear automatically at checkout (except where noted).
What’s Included in the Black November Sale
💪 10% Off EasyBuild & EnviroPro Polytunnels
Our EasyBuild and EnviroPro Single Span polytunnels are both included in the sale, perfect if you’ve been waiting for the right moment to invest in a structure that lasts.
Use code BN10 at checkout to get 10% off your tunnel.
- EasyBuild: From 2.5 – 4.5m wide. Designed for home and allotment growers, with easy assembly, timber-free design, and all the strength you’d expect from a professional structure.
- EnviroPro Single Span: From 5m – 9m wide. The commercial grower’s choice, engineered strength, exceptional ventilation options, and trusted by RHS gardens and professional nurseries across the UK.
(Note: Discount code must be entered at checkout for these items.)
🌿 10% Off Benching
A great time to optimise your growing space, all benching systems are 10% off this month. Our metal benches are strong, rust-free, and designed for professional propagation or display.
💨 50% Off Heating, Ventilation & Circulation
The biggest saving of the month! Proper air movement prevents mould, strengthens plants, and maintains even temperature throughout your tunnel or greenhouse. For November only, heating, ventilation, and circulation products are half price, while stocks last.
🔧 40% Off Parts & Accessories
From door kits and braces to repair materials, get 40% off essential parts this month. It’s the ideal time to stock up on components and ensure your tunnel is in top condition for the season ahead.
💧 20% Off Water Collection & Irrigation Kits
Make every drop count. Our water collection and irrigation systems are 20% off all month, helping you save time, money, and water next season.
How to Claim Your Discounts
To redeem your Black November polytunnel sale offers:
- Visit our Black November Sale page.
- Discounts apply automatically at checkout, except for EasyBuild and EnviroPro, which require coupon BN10.
- Offers end 30th November 2025.
Why Buy from Northern Polytunnels?
When you invest in a Northern Polytunnel, you’re investing in decades of engineering expertise and structures built to last. Since 1969, we’ve been designing and manufacturing growing environments that meet British Standards for strength and reliability, ensuring every tunnel, shelter, and accessory is built to perform in real-world British weather.
Our designs are tested, proven, and trusted by everyone from home growers to professional horticultural businesses, the RHS, and National Trust gardens. We don’t just sell polytunnels, we build them, supply the parts, and support you long after installation.
So while others might discount for a weekend, we’re offering Black November savings on structures that deliver year after year of dependable protection and performance.
🌤️ Ready to Grow Stronger Next Season?
Black November is your chance to invest in the last polytunnel you’ll ever need, with savings across everything from small allotment setups to large-scale commercial structures.
